小龙湾地区油气成藏特征及储层预测

RESERVOIR FORMING CHARACTERISTICS AND RESERVOIR PREDICTION IN THE XIAOLOGWAN AREA

小龙湾地区位于辽河盆地东部凹陷热河台油气田东南侧，属于翘倾断块复式油气聚集带。在对该区构造演化史、沉积史深入研究的基础上，建立了成藏模式。分析认为，受烃源条件、圈闭条件的控制，在该区内不同部位发育了岩性圈闭、构造—岩性圈闭、不整合面圈闭、古潜山圈闭、披覆背斜圈闭等。据此，分别对翘倾断块低部位的上倾方向、下倾方向，以及翘倾高部位进行了储层预测。今后的勘探重点应放在Ｅｓ３构造—岩性圈闭和Ｅｓ１岩性尖灭圈闭上，并兼顾对古潜山和披覆圈闭的勘探。

Located on the southeast side of Rehetai oil gas field in the east sag of Liaohe Basin,Xiaolongwan area is a compound oil gas accumulation belt with warped fault blocks.On the basis of researching on Structural evolution history and depositional history in the area,a reservoir formation mode is set up.Contrulled by hydrocarbon source and trap conditions,lithologic trap,structure—lithologic trap,unconformity trap,buried hill trap,drape anticline trap etc are developed in the various parts of the area.The reservoirs in updip and downdip direction in the low position and the high position of warped fault blocks are predicted.The future exploration stress should be put on E s 3 structure—lithologic trap and E s 1 lithologic pinching trap;meanwhile,the buried hill and drape anticline traps shoule also be given consideration.